Spring construction



July 30, 1946. w 2,404,883

SPRING CONSTRUCTION Filed April 17, 1942 INVENTOR fly/ren' 7b1zm Patented July 30, 1946 5 PATENT OFF] SPRING CONSTRUCTION Andrew 'Mouw, Huntington Woods, when, as-

signor to No-Sag Spring Company, Detroit, Mich, a corporation-of Michigan Application April 17, 1942,--Serial No. 439,311

.1 My lnyentionrela'tes to spring constructions, and particularlyto .a .spring structure and. a method of assembling springs to .a frame to .form a spring surface.

The present invention pertains to attaching means for the ends of z'ig-zag spring strips. 'Ihe strips follow the construction of the spring strip illustrated, described, and claimedin the Karl Kaden ReissuePatent No. 21,263, issued .November '14, 19.39.. The invention pertains to .a .Irame having slots on the inner faces of the frame members "in which the ends of the spring strips may .projec't. Nails are driven through 1111851015 in the i'rame members from the under .s'ides thereof to be disposed in pairs aligned with pairs onthe opposite frame member. The projedtingends of the spring strips are disposed the slots jot-the opposite members and move behind the pair of nails where the ends are retained by 'the ..reverse1y bent end portions on the ends 'oi'thestrips. 'The assembled springs maybe joined together by suitable clipsfland the endmos'tfspring.strips have coil springs hooked over the convolutions and .over individual nails which are drivenjthroughthe name members H wni s, t .are;,, to term a jframe irom opposite members having slots on theTinnerYr'tace through which in 'b'ects or my invention pairs-of .nails 'eiitend for receiving the ends, of ff the spring strips; .to provide'pairs of nails extending through slots in the, inner .face of the ,frame members whichffo'rm anchoring means for theends of springstrips extended" thereacross;

to construct a frame from wooden side and end members which have slots in their inner face throughywhioh 'nails"*project which form andhoringfmeans for the end of spring strips extending across theL siide frame members and "joined'iby coil. springs to'the endiframe members; tandin general, to .provide a spring structure which is rigid, readily assembled, and economicalofmanufacture.

Other "objects :and features of "novelty of my invention will "be specifically pointed out or will become apparent when referring, for a better understanding 'of :my invention, to the following description "taken in conjunction 'with "the aceompanying drawingwher einz Figure 1 is a pla'n"view of a spring unit embodyingfeatures'of my invention; 2 is an enlarged sectional view of the structure Fillustratedinfig. Ltaken on the line 2--'2-theredi;

Fig. .3. is a sectional view of the structureillus- 8 Claims. (01. 5- 4-89) iii trated-in Fig. 2, taken on the line .33 thereof; 4 is an enlarged sectional. View oi the structure illustrated in Fig. 1,: taken on the line 4-4 thereof; I

Fig. 5 is a sectional view of the structure illustrated in Fig. 4, taken on the 1ineJ5--5 there- .Fig. '6 is a view of structure similar to not .illustrated in Fig. 2, showing another form of my invention.

I have illustrated the frame 10' comprising longitudinally disposed members ll and." end menibers l2, the inner .iaces .[3 of which are provided with aslot M. The endmembers [2 have a. dowel 15 on their ends which "project into the slot M on thememhers H to. secure the members in aligned fixed relation. Gusset plates It may be disposed .in the slots at] each of the corners to further strengthen the frame.

f The longitudinally extending members Ll have pairs .l'! of nails 1.8 or similar pin-like elements, disposed in spaced relationand aligned on opposite sides of the frame. The nails project upwardly .from the bottom or the frame, through the slots, into the upper portion of the members. .Preferably holes are'ldrilled through the lower half of the members by using. a layout fixture, after which the nails are driven intojthe holes, through the slot into the upper portions of the members. In a similar manner, individual nails 2.2 are provided in the end members 12 for a purpose which will h explained hereinafter. r

Spring strips .23, which are disposed across the iram'es, are of conventional dorm, being similar to the spring illustrated, described .and claimed in the above-mentioned Kar1 Kaden reissue patent, which was assigndtothe assignee of the present invention. The ends of the strips are provided with a .hook. any which. the springs are anchored .ag'ainst movement from the nails, .After theframe has been constructed, with the nails. in position,,.the .spring strips .are

then assembled byhooking the ends-of the spring .over .a .pair'of the nails and stretching the opposite 'end of the spring across the frame and disposing its end over the pair of nails I! .on the opposite longitudinally extending member .11. After all of the spring strips .are assembled in zthismanner they may be joinedtogether by .a plurality of wire clip ;25 .to distribute the applied load over the strips. 7 V

The .endmost strips .are joined to the endmembers l2 by coil springs .26, the coil springs and clips h'aving'partially closed. ends 21 bywhich they may be sprung over the wires of the spring strips '23. and securely anchored thereon. A simi- "lar endZl is provided on the opposite end of the coil springs z fi wh'ichi engages the nail Mend secures the'jcoilspring to the "end memb r i said longitudinal members.

The assembly operation may be performed without the useof tools since it merely requires the insertion of the ends of the spring strips over the pairs of nails'and the application of the clips 25 and the coil springs 26 thereto.

the frame elements II and I2 by having one leg extended into the wood rearwardly of the slot.

The holes for the staples may be 'drilled'partially into the wood, preferably from the underside of the frame, by the useof a drilling fixture. The spring strip 23 may be inserted in the'apertures and the spring placed in position in the slot where they are secured when the staples are driven the remainder of the way into the wood. The staples may be driven completely into the wood and the ends of the spring hooked over the pair of lugs in the slot to secure the ends in position. In either manner of assembly the ends are supported over the adjacent pairs of pins which extend through the slots. I have illustrated a beveled edge 3| on the lower edge of. the slot for preventing the spring from striking the edge when deflected.

I claim as my invention: 1. In a spring construction, a frame comprising longitudinally extending members and cross members which space the longitudinally extending members a predetermined distance apart, slots provided in inwardly presenting faces of the members, pins disposed in slots in oppositely disposed members of the frame in oppositelyaligned pairs, and spring strips having laterally extending end portions with each end portion inserted in a slot and moved behind a pair of the pins for anchoring the strips across the frame.

2. In a spring construction, a frame comprising longitudinally extending members and cross members which space the longitudinally extending members a predetermined distance apart, slots provided in inwardly presenting faces of the 'members, pins disposed in slots in oppositely disposed members of the frame in oppositely aligned pairs, spring strips having laterally extending end portions with each end portion inserted in a slot and moved behind a pair of the pins for anchoring the strips acrossthe frame, and coil springs engaging certain of the convolutions of the endmost strip with one end and having the opposite end anchored over pins projecting through the slots in the endmost members.

3. A spring construction including,i'n combina-' tion, a frame comprisin spaced longitudinally extending members and end members attached thereto, the inner faces of said membersbeing provided with slots, pairs of pins extending through the slots in said longitudinally extending members in aligned relation on opposite sides of the frame, spring strips made of Wire having laterally extending ends hooked behind pairs of said aligned pins'for forming a, pring surface between thereto,the inner faces of said members being provided with slots, pairs of pins e t ndi g The resulting; spring structure is extremely rigid and durable,

aligned pins for forming a spring surface between said longitudinal members, said laterally extending ends having a reversely bent end portion which secures the ends in position. 7

5. A spring construction including, in combination, a frame comprising spaced longitudinally extending members and end members attached thereto, the inner faces of said members'being provided with slots, pairs of pins' extending through the slots in said longitudinally extending members in aligned relation. on oppositesides of I the frame, spring'strips made of wire having laterally extending ends hooked behind pairs'of said aligned pins for forming a spring surface between said longitudinal members, individual pins extending through the slots in the end man-- bers, and means'for connecting the side p'ortions of the endmost spring strips to the pins in said end members. V I j J 6. .A spring construction including, in combination, a frame comprising spaced longitudinally extending members and T end members attached thereto, the inner faces .of said" members being provided with slots, pairs of pins. extending through the slots in said longitudinally extending members in aligned relationon oppositejs'ides of the frame, spring strips made of wire having'laterally extendingends hooked behind pairs ofsaid aligned pins. for forming. a spring surface between saidlongitudinal members, said laterally extending ends having a reversely bent end portion which. secures the ends in po'sition', said pins being spaced from the bottom of the slots an amount suflicient to permitthe reversely bent end portion to be insertedover the pins. Q .7. A spring construction, including, in combination, a frame comprisingspaced longitudinally extending members and end members attached thereto, the inner, facesof saidmembers being provided with slots, gusset platesdisposed in the slots in the inner corners of said frame, pairs of p s ext h ou h t esldtsinis idr ofis t .slots when the ends are. inserted over the pairs of. pins for forming a spring surface across the frame. I v8. Aspringconstruction, including,.in combination, a framecomprising spaced longitudinally extending members and end members attached thereto, the inner. faces, of said members being provided with slots, gusset plates disposed inthe slotsin the inner corners of said frame, pairsof pins extending through the slots in said longitudi nally extending members in aligned relationon opposite sides of said frameandspaced from .the

' bottom of said slots, spring strips made off.. wire bent in zig-zag formation. having laterally ex,- tending end portions reversely bent to formrhooks which pass between the pins andb'ottorn ofthe slots when the ends'are inserted. over the. pairs of pins for forming a spring surface across the frame, individual pins extending through the slots in the end members, and means interconnecting the springs to each other and the pins n h members. I 1

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